{
  "capability_id": "engineering.uncertainty.weighted_mean",
  "calculation_version": "1.0.1",
  "protocol_version": "1.0.0-proposed",
  "protocol_document_status": "proposed",
  "verification_revision": "2026-09-23.o2-o3",
  "claim_scope": "O2: JCGM 100 H.3 inverse-variance weighted mean vs separate-module identities (≤2 ULP). Not RSS, not Type A, and not U=k·u_w. ≤2 ULP vs O3 applies only to the published tabulated H.3 vectors (equal weights, unequal weights, a single result, aliases, a signed measurand, doubled uncertainties, and one awkward triple). It is not a whole-domain guarantee and does not cover RSS, Type A, or U=k·u_w.",
  "oracle": {
    "class": "O3",
    "library": "mpmath 1.4.1",
    "mpmath_dps": 80,
    "backend": null,
    "rounding": null,
    "independent_of_iut": true,
    "generator_id": "weighted-mean-mpmath-o3",
    "generator_version": "1.0.0",
    "generator_sha256": "2baa044c7c7ee5d8ae102b3adae600083670248b894f331bd0106b1b24eee9b6",
    "table_sha256": "36fd74913f6b655063cf240a332366c7db4eb71231cc636c66af13fd0024aa27"
  },
  "result_summary": {
    "passed": 8,
    "total": 8,
    "failed": 0,
    "max_error_ulp": 2,
    "threshold_ulp": 2,
    "max_threshold_ulp": 2
  },
  "public_files": {
    "manifest": "/evidence/engineering.uncertainty.weighted_mean/1.0.1.cvp.json",
    "this_file": "/evidence/engineering.uncertainty.weighted_mean/reproduce.json"
  },
  "vectors": [],
  "disclosure": {
    "policy": "calculatorx-public-evidence-v1",
    "full_validation": "private",
    "representation": "summary",
    "kind": "reproduce"
  }
}